1 / 14

RHODES ADAPTIVE SIGNAL OPERATIONS, MAINTENANCE & LESSONS LEARNED

RHODES ADAPTIVE SIGNAL OPERATIONS, MAINTENANCE & LESSONS LEARNED. Presented by: Ken Jacobs Pinellas County Public Works Traffic Management Division. SYSTEM DESCRIPTION. Pinellas County was seeking to replace the existing UTCS based Computerized Signal System in 2000

chessa
Download Presentation

RHODES ADAPTIVE SIGNAL OPERATIONS, MAINTENANCE & LESSONS LEARNED

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. RHODES ADAPTIVE SIGNAL OPERATIONS, MAINTENANCE &LESSONS LEARNED Presented by: Ken Jacobs Pinellas County Public Works Traffic Management Division

  2. SYSTEM DESCRIPTION • Pinellas County was seeking to replace the existing UTCS based Computerized Signal System in 2000 • The County has very few Freeway miles and the majority of traffic runs on Arterials • Implementation of a Full Scale Regional Corridor Management Arterial ITS system was viewed as the best solution for the County, which included Adaptive Control System • FHWA Sponsored RHODES and OPAC were selected by the joint agency ITS Committee

  3. SYSTEM DESCRIPTION • Initial Installation had RHODES operating on Siemens I2 Central Software System, while OPAC ran on MIST® Central Software • OPAC was Installed on a Major North – South Arterial and is still operating today. • Each Arterial had full CCTV Camera Coverage and Dynamic Message Signs for Advanced Traveler Information / Incident Management System • Currently there are 4 Major Arterials in Final Stages of Completion and 5 more in Different Stages of Design through Construction

  4. RHODES OPERATION • 17 intersections on Gulf-To-Bay Blvd (SR60) in the City of Clearwater, avg. ¼ to ½ mile spacing • Fiber Optic Communications throughout Installation Corridors • Additional Arterial and Associated Intersections are Planned for RHODES Install 6 Lane Divided, 60,000 AADT, 40 MPH

  5. SUCCESS OF THE SYSTEM • Independent before/after studies were done in 2006 and repeated in 2008 • Study determined that RHODES SR60 travel times were reduced by an average of 8% consistent in most all time periods • The results determined there was over $1 million in annual fuel savings alone as a result of the new system, and a benefit/cost ratio of approximately 7:1 • The 2008 study showed additional improvement with an average over before period of 14%

  6. SUCCESS OF THE SYSTEM From the 2006 Before/After Study, changes were implemented to improve progression and decrease travel times on the corridor in the AM and PM peak periods

  7. GENERAL ADAPTIVE LESSONS LEARNED • Some of the public comments stated the signals were operating erratically - comparing them to the traditional, more predictable time-based signal timing plans • Due to the high volumes on the main street, the algorithm can tend to shortened side street and left turn green times to reduce overall vehicle delay at the intersection (as expected) • Software didn’t handle random interruptions in the system, such as emergency preemption and main street pedestrian crossings as well as expected

  8. GENERAL ADAPTIVE LESSONS LEARNED, cont. • Parameters (i.e. discharge rates, turning ratios, etc.) covered the entire day. Needed to be settable by time of day • Even the smallest system detection problem can lead to adaptive operation problems • There is a need to extensively train existing engineers and technicians in adaptive operation and troubleshooting

  9. MAINTENANCE LESSONS LEARNED, cont. • Keeping the upstream system detection online and functioning is critical to operation of both adaptive signal systems • Biggest threat to stability of system is LIGHTNING! Maintain the grounding systems • The ‘software vendor’ is through a university (ASU), and maintenance availability can be inconsistent compared a private companies

  10. RHODES LESSONS LEARNED • Knew we needed to make one common Central Software Platform if both Algorithms were going to continue to be used • Personal Opinion • RHODES Does Work, Algorithm has Good Potential • Existing Facilities Need Further Fine Tuning to Satisfy Concerns Voiced by Some Complainants • Staff Time is Short, Not A Vendor Issue

  11. CORRECTIVE ACTIONSIMPLEMENTED • RHODES introduced ‘time-of-day’ configurable parameters activated by adaptive plan changes scheduled in local controller firmware • Improving maintenance agreements with software vendors to address response times to issues identified • RHODES integration into MIST® to utilize an operator-friendly GUI for adaptive parameter editing, similar to OPAC’s current GUI

  12. CURRENT MODIFICATIONSIN THE WORKS • For Political Reasons we are Currently Operating RHODES Sections on Timing Plans for AM and PM Peaks and ACS the Remainder of the Day • Our intent is to make parameter changes to RHODES that will make its operation more in-line with citizen expectations (i.e. green bands versus system wide delay)

  13. WHERE DO WE GO FROM HERE? • During a major incident, adaptive operation and recovery needs to be enhanced – quicker reaction time and better recovery (cycles/green splits) • Adaptive software should predict, calculate and implement various operational scenarios, based on random events such as pedestrian calls, emergency preemption and transit priority • Looking into Integrating Rhodes to Operate with Additional Controller Firmware. Preferably start with Firmware currently being used with OPAC

  14. EXIT QUESTIONS? Pinellas County Traffic Management 727-464-8922 kjacobs@pinellascounty.org

More Related